Feed mechanism for shears.



No. 686,075. Patented Nov. 5, 190i.

S. V. HUBER.

FEED MECHANISM FOR SHEARS.

(Application filed Fab. 2, 1901.)

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(No Model.

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No. 686,075. Patented Nov. 5, l90l.

FEED MECHANISM FOR SHEABS (Application filed Feb. 2, 1901.

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No. 686,075. I Patented Nov. 5, I90l. S. V. HUBER.

FE ED MECHANISM FOR SHEARS.

(Application filed Feb. 2, 1901.) (No Model.) 9 Sheets8heet 3.

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No. 686,075. Patented Nov. 5,1901.

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FEED MECHANISM FOR SHEABS.

{Application filed Feb. 2, 1901.) w

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(No Model.)

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FEED MECHANISM FOR SHEARS.

(Application filed Feb. 2, 1901.)

9 Sheets-Sheet 5.

(No Model.)

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Patented Nov. 5, I90].

8. V. HUBER.

FEED MECHANISM FOR SHEARS.

(Application filed. Feb. 2, 1901.)

(No Model.)

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No. 686,075. Patented Nov. 5, I90l. S. V. HUBER.

FEED MECHANISM FOR SHEABS.

(Applicatiun filed Feb. 2, 1901.)

(No Model.) 9 Sheets-8heet 7.

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Nu.686,075. Patented Nov. 5, 190i.

8. V. HUBER. FEED MECHANISM FOR SHEARS.

(Application filed Feb. 2, 1901.; (No Model.) 9 Sheets Sheet 8.

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U ITED STATES PATENT @rrrch.

SIGMUND V. HUBER, OF PI'IT SBURG, PENNSYLVANIA.

FEED MECHANISM FOR sHEARs.

SPECIFICATION forming part of Letters Patent No. 686,1)2'5, datedNovember 5, 1901.

Application filed Feliruary 2, 1901. Serial No. 45,726. (No model.)

To all whom, it may concern:

Be it known that I, SIGMUND V. HUBER, a citizen of the United States,residing at Pittsburg, in the countyof Allegheny and State ofPennsylvania, have invented or discovered certain new and usefulImprovements in Feed Mechanism for Shears, of which improvements thefollowing is a specification.

The invention described herein relates to certain improvements inmechanism for shearing plates, bars, &c., and has for its object aconstruction whereby the feed of the plates or bars is prevented duringthe shearing operation and while the parts sheared are being fed away;and it is a further object of the invention to provide for the automaticremoval of a gage-block from the path of movement of the sheared piecesand to provide for the consecutive operation of shearing, feeding, andclamping in such order and; at such time intervals thatthe severalopera- 1 tions can proceed without interfering with each other.

The invention ishereinafter. more fully de- 1 scribed and claimed.

In the accompanying drawings, forming a part of this specification,Figure 1 is a view,

partly in section and partly in elevation, of

a shear mechanism with feed, clamping, and gaging mechanism. Fig. 2 is ascctionalplan View, the plane of section being-indicated by the line IIII, Fig. 1, of the mechanism for feeding the plates or bars to the shearand clamping them during the shearing operation. Fig. 3 is a sectionalelevation on the plane in-; Fig. 4: is

dicated by the line III III, Fig. 1. a similar view on a plane indicatedby the line IV IV, Fig. 3. Fig. 5 is a top plan view,

of the gage and the clamping mechanisms Figs. 10, 1.1, 12, and 13 arediagrammatic views illustrating the operation of theelectrically-controlled devices.

In the practice of my invention the shear mechanism is constructed inany suitable manner, the movable blade 1 being operated by a suitablemotor directly or through suitableinterposed mechanism,asgearing,shat'ts, and cams, as shown. Provision is made by a clutchmechanism, as isciistom'ary, whereby the movement of the movable bladecan he contro1ledt'. e., the blade can be stopped and started asdesired. mechanism is arranged a suitable feed mechanism consisting of aseries of positivelydriven rollers 2 and by preference a series of upperrollers 3, arranged to bear yieldingly upon the plates or bars beingfed. These rollers 3 are mounted so as to revolve loosely in arms ofbell crank levers 4, pivotally mounted upon a shaft or a series ofshafts ex tending across the feed-table. The rollers are held yieldinglyagainst the plates or bars by means of springs 5, which bear against thefree arms of the bell-crank levers and against a suitable abutment, asclearly shown in Fig. 1. This construction permits of the independentmovement ofeach of the upper presser-rollers, so that plates or bars ofvarying thicknesses can be simultaneously fed to the shear mechanism.

The clamping mechanism consists of two blocks or heads 6 and 7, arrangedtransversely of the front feed-tableand above and below the plane offeed of the plates or bars. These blocksorheadsaremovablymountedinguides 8, secured to the side frame of thefeed-table, and are respectively connected by links 9 and 10 to theendsof levers 11, having their journals mounted iii-suitable bearings 12.These levers are so connected to the heads or blocks that when one ofthe latter is moved up the other will be moved. down, and vice versa, sothat they move simultaneously toward and from the plates or bars on thefeed-table. These heads or blocks are operated by fluidpressurecylinders 13, provided with rams 14, which are connected to or supportthe lower head or block 7. As this head or block is raised by the ramsthe head or block 6 will be drawn down to efieot a clamping ofthe platesor bars. The downward movement of the head or block 7 is effected byafluid-pressure cylinder 15 through the medium of a lever 16, one end ofwhich is connected to the head or block and the opposite end is shiftedby the fluid-pressure cylinder 15, in which is kept a constant pressuresufficient to effect a down In front of the shear '13 are relieved frompressure.

the plates or bars. To prevent injury or defacement to the plates orbars, the lower clamping-head is provided with spring blocks or cushions18' to bear against the plates or bars. i

By the operation of the feed mechanism the plates or bars when releasedfrom the grip of the clamping mechanism are fed through between theblades of the shear and'onto suitable feed-rollers 19 of the feed-tablearranged inthe rear of the shear mechanism. This feed-table is pivotallysupported at or near its rear end, and its front end is connectedbylinks 20 to the movable blade of the shear mechanism, so that suchfront or entering end of the feed-table will rise and fall with themovable blade. By the operation of the feedtables in front and in therear of the shearblades the plates or bars will feed along until theycome in contact with the movable stop or gage bar 21, formed on orsecured to the lower ends of slides 22, which are mounted in suitablebearings 23, secured to the frame of the gage mechanism. The upper endsof these slides 22 are loosely connected to the free ends of levers 24,which have their opposite ends pivoted to standards 25, secured to theframe of the gage mechanism. The levers are shifted to raise and lowerthe gage bar or stop 21 by means'of cams 26, secured on a shaft 27,mounted in suitable bearings on the frame of the machine. is secured awormwheel 28, which intermeshes with the worm 28, formed on thearmature-shaft or on a shaft driven by the armature of the electricmotor 29, whose operation is controlled as hereinafter described. Theframe gage mechanism carrying the parts heretofore described is providedwith wheels 30, mounted upon side rails 31 of the rear feed-table,arranged in the rear of the shear mechanism. As shown in Figs. 5 to 8,one pair of wheels is secured on shaft 30, which is driven throughsuitable gearing by the elec tric motor 32, mounted upon the buggy, asshown in Figs. 5 and 6. In order to hold the gage mechanism in itsadjusted positions, a suitable locking mechanism is connected to thebuggy, whereby the latter may be secured to the rails 31 of thefeed-table in any suitable manner, and this anchoring or clampingmechanism is adjustably connected to the gage-bugg proper for thepurpose of permitting a more accurate adjustment of the gagebar than canbe quickly effected through the On this shaft.

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operation of the electric motor 32. A con-' venient construction forthis purpose consists of connected slides 33, mounted upon the siderails 31 and provided with pins 34, adapted to be pushed into holes 35in the side rails. The ends of these pins are connected to one end oflevers 36, which have their opposite ends connected together by a rod orbar 37. The pins are simultaneously shifted into and out of engagementwith the side rails by any convenient means-such, for example, as thehandle 38, connected to one of the levers 36, as clearly shown in Figs.5 and 6. This anchoring or clamping device is connected by screws 39 tothe gage-buggy proper, and said screws are adapted to be turned by meansof hand-wheels 40, secured on shaft 41, provided with worms 41, engagingworm-wheels on the ends of the screws 39. The screws enter threadedopenings in the slides 33, and when the latter are secured in positionon the side rails, as described, a rotation of the screws will shift thegage-buggy toward and from the clamping or holding slides. The holes inthe side rails 31 for the reception of the locking-pins are arranged anequal distance apart-say one foot, more or lessand by the operation ofthe electric motor the gagebuggy,with its clamping-slides, can beshifted such distance or a fraction of the distance between adjacentholes 35. Then the clamping or looking slides are secured to the siderails by the locking-pins, andif the gage is not in proper position thehand-wheels 40, operating the screws 39, are rotated so as to bring thegage bar or block 21 to the required position. It is preferred toarrange a scale 42, divided into fractional parts-of the distancesbetween the two adjacent holes 35 in the side rail, on either theclamping devices or the gage-buggy and to secure a pointer orindex-finger43 on the other member, as clearly shown in Fig. l.

As hereinbefore stated, it is desirable that the gage buggy or blockshould be in operative positioni. e., in the line of feed of bars orplates on the feed-tableduring the descent of the shear-blade, so as tostop the feed of the bars or plates, and that such gage-block should'belifted as soon as the shear-blade has operated and should remain up asufficient time to permit of the feed of the sheared pieces beyond thegage-block. As soon as such sheared pieces have passed beyond thegage-block the latter should be lowered, and at the same time theclamping mechanism in front of the shear-blade should be operated so asto release the plates or bars held thereby and to permit their feedforward between the shear-blades to the gage-block. While these severalmovements may be effected in a variety of ways, to attain the bestresults the operation of the several mechanisms should be automatic andcontrolled one by the other and all controlled by the movableshear-blade. A desirable construction and arrangement of mechanism forthis purpose consists in the employment of electric motors and suitablecontrollers for the currents through such motors. By reference to Figs.1 and 9 it will be seen that a series of trolley-wires are arrangedabove the line of movement of the gage-buggy, on which are mounted postsor standards 44, carrying trolley-arms 45, yieldingly held in contactwith these trolley-wires, so that the electric motors on gage-buggy willbe in circuit with the generator, except as hereinafter described.

As shown in Figs. 9 to 13, one circuit is formed by a wire 46, extendingfrom a generator (not shown) to one pole of the electric motor 29. Theother pole of this motor is connected by a wire 47 to one of a pair ofbrushes 48, bearing on the commutator 49 on the shaft 27 of thegage-buggy, the other brush of the pair, wire 50, one of a pair ofbrushes 51 of the commutator 52 on the power-shaft of the shear or acounter-shaft operated by the power-shaft, the other brush of this pair,and wire 53 to the generator. A second circuit, for purposes hereinafterdescribed, consists of wire 46, motor 29, wire 54 from the otherterminal of motor, one of a pair of brushes 55 of the commutator 49, theother brush of the pair, wire 56, one of a pair of brushes 57 of thecommutator 52, the other brush of the pair, and wire 53 to thegenerator. By this arrangement of circuits it is necessary for theoperation of the motor 29, either up or down, that the shear-bladeshould be in a certain predetermined position. Before the gage bar orblock can be raised by motor 29 it is necessary that the shear-bladeshould be at the lower limit of its stroke, at which time the brushes 51will be electrically connected by a metallic strip 58 on the commutator52, so that a current will be established from the generator through thewire 46 to the motor, wire 47, brushes 48, which are connected by asuitable strip 59 on the commutator 49, wire 50, brushes 51, and wire 53to the generator. As long as this circuit is maintained the motor 29will be operated to raise the gage-block; but the upward movement willbe arrested as soon as the gage-block has reached the upward limit ofits movement by the passage of the metallic strip 59 of the commutator49 away from one or both of the brushes 48 and also by the passage ofthe metallic strip 58 on the commutator 52 from the brushes 51. Thebreakage of the circuit at either commutator will arrest the upwardmovement of the gage-block. At about the time of rupture of theconnection between the brushes 48 of the commutator 49 the connected bya suitable strip 60 on the commutator 49, thereby restoring at thispoint the circuit through the motor 29, consisting of wire 46, motor,Wire 54, brushes 55, wire 56, brushes 57 of commutator 52, and wire 53;but this circuit through the motor will be held open, as the brushes 57will not be electrically connected by stop 61 until the shearbladebegins its downward movement or just as it completes its upwardmovement. As soon as the gage is returned to or nearly to operativeposition in line with the feed of the plates or bars the clampingmechanism should be released, so as to permit of the forward feed of theplates or bars to be sheared. This is efi'ected by means of an electricmotor-as, for example, an electromagnet 62, having its armatureconnected to the valve 63 of the fluid-pressure cylinders 13, operatingthe clamps. The circuit of this motor is controlled by means of thecommutators 49 and 52, so that both the gage-block and the shear must bein a certain predetermined position prior to the operation-i. e., eitherthe opening or closing of the clamp. The circuit for this electric motorconsists of the wire 64, leading from a generator, the motor 62, thewire 65, brushes 66 of commutator 52, and wire 67 to generator or wire68, brushes 69 of commutator 49, and wires 70 and 67 to generator.

In Fig. '10 is shown diagrammatically the position of the shear, theclamp, and the gage bar or block and commutators 49 and 52 just as theshear has completed its downward stroke. It will be observed that thestrip 60 is just leaving the brushes 55 and that the brushes 57 are outof contact with their strip 61 on the commutator 52, showing that thegage-block is in its lowest position and was at rest some time prior tothe completion of the downward stroke of the shear. The strip 59 ofcommutator 49 and the strip of commutator 52 are in contact with theirbrushes, so that the motor was at the completion of the stroke of theshear in operation to lift the gage-block. The strips 71 and 72 ofthecommutators are in contact with the brushes 66 and 69 of the circuitthrough the motor 62, controlling the clamp, so that such clamp is inoperative position to prevent any onward feed of the bars or platesbetween the shear.

In Fig. 11 the shear-blade and gage-block are shown raised, the circuitfor the gageblock, formed in part by brushes 51,is broken, and thecircuit for continuing the operation of the motor so as to drop thegage-block is completed and the latter is in its downward movement. Thecircuit for the motor 62,

IIO

controlling the clamp, is broken on commutator 52, but is closed andwill be held closed on commutator 49 until the gage-block is down.

In Fig. 12 the shear-blade is still up, the gage-block has completed itsdownward movement and is at rest, and the circuit for the motorcontrolling the clamp is broken, so that the clamp has separated topermit the onward feed of the bars.

In Fig. 13 the circuits for the gageblock are broken on the commutator52, the circuit for the motor 62 of the clamp mechanism is completed andthe clamp is in operative p0- in the levers.

sition to prevent an onward movement of theplates or bars, and theshear-blade is part way down to shear the bars or plates.

In Fig. 9 are shown two complete circuits, formed by wires 7a and 75,for the motor 32 for shifting the gage-buggy back and forth. By means ofthese circuits, which are controlled by suitably-located switches,reverse currents can be sent through the motor 32 to shift thegage-buggy back and forth as required.

By reference to Figs. 1 and 7 it will be seen that the aprons of therear feed-table are below the upper surfacesof the feed-rollers 19 andthat the stroke or place of movement of the gage-block must be adjustedso that it will bear upon the apron and also upon the roller. A changeof position of movement is provided forby employing rollers 76 as thebearings for the cams 26 on the levers 24. These rollers 76 are mountedin the sliding blocks 77, and the adjustment of the blocks and rollersiseffected by means of screws 78, connected with blocks, so that by therotation of the screws the blocks can be shifted The screws are operatedby means of hand wheels 79 on a shaft 80, said shaft being provided withbeveled pinions 81, intermeshing with corresponding pinions on the upperends of the adjustingscrews. By moving these bearing-rollers 76 up anddown the position of stroke of the gage-block can be changed as requiredto cause the gage-block to bear on the aprons or feed-rollers 19.

I claim herein as my-invention'- 1. In a mechanism for shearing platesor bars, the combination of a shearing mechanism, mechanism for clampingthe plates or bars in front of the shearing mechanism, and meanscontrolled by the shearing mechanism for operating the clampingmechanism, substantially as set forth.

2. In a mechanism for shearing plates or bars, 650., the combination ofa shearing mechanism, positively-driven feed-rollers arranged in frontof the shear mechanism,

presser-rollers, means for holding the presserrollers yieldingly againstthe plates or bars on the feed-rollers, means for shifting thepresser-rollers controlled by the shear mechanism, substantially as setforth.

3. In a mechanism for shearing plates or bars, &cl, the combination of ashearing mechanism, a clamping mechanism arranged in front of the shearmechanism, mechanism for feeding the plates or bars to the shearingmechanism controlled by the clamping mechanism, and means controlled bythe shearing.

mechanism for operating the clamping mechanism, substantially as setforth.

4. In a mechanism for shearing plates,bars, &c., the combination'fof ashearing mechanism, a movable gage block or bar arranged in the rear ofthe shearing mechanism, a clamping mechanism arranged in front of theshearing mechanism, and means controlled by the shearing mechanism andthe gage block or bar for shifting the clamping mechanism, substantiallyas set forth.

5. In a mechanism for shearing plates,bars, &c., the combination of ashearing mechanism, a series of trolley-wires arranged in the rear ofthe shearing mechanism and connected to a suitable generator, a carriageor buggy movably mounted in the rear of the shearing mechanism, a gageblock or bar mounted in the buggy, electric motors arranged upon thebuggy or carriage for shifting the buggy and gage-block, movablecontacts for connectingthe motors with the trolley-wires, switches ormake-and-break mechanisms controlling the electric motors, substantiallyas set forth.

6. Ina mechanism for shearing plates,bars, &c., the combination of agage block or bar, means for shifting the gage block or bar into and outof the line or path of movement of the plates or bars, and means forchanging the position of. movement of the gage block or bar,substantially as set forth.

7. In a mechanism for shearing plates,bars, &c., the combination of ashearing mechanism, a gage block or bar, electrically-controlledmechanism for shifting the gage block or bar, and make-and-breakmechanisms operated by the shearing mechanism and by the mechanism forshifting the gage block or bar controlling the circuits of thegage-operating motor, substantially as set forth.

8. In a mechanism for shearing plates,bars, &c., the combination of ashearing mechanism, mechanism for feeding the plates or bars, a gageblock or bar movable into and out of the line of movement of the platesor bars and a clamping mechanism controlled by the gage block or bar,substantially as set forth.

9. In a mechanism for shearing plates,bars, &c., the combination of ashearing mechanism, a gage block or bar, and mechanism for feeding theplates or bars controlled by the gage block or bar, substantially as setforth.

In testimony whereof I have hereunto set my hand.

' SIGMUND V. HUBER. Witnesses:

DARWIN S. WOLCOTT, F. E. GAITHER.

